Connection between a water-tube and a pressure-basin mounting the water-tube



H T. HEYERDAHL. CONNECTION BETWEEN A WATER TUBE AND A PRESSURE BASIN MOUNTING THE WATER TUBE.

APPLICATION FILED AUG.9| l9l9. 1,342,286.-.

Pateilted June I, 1920.

enumerates-Patter car es.

THORVALD HEYERDAHL, OF CHRISTIANIA, NORWAY.

CONNECTION BETWEEN A WATER-TUBE AND A PRESSURE-BASIN MOU1\TTI1\TG THE WATER-TUBE. i

Specification of Letters Patent.

Pate ted June 1,1920.

Application filed August 9, 1919. Serial No. 316,425. v

To all whom it may concern:

Be it known that I, THoRVALD I-IEYER- DAHL, a subject of the King of Norway, re-

siding at Christiania, Norway, have invented certain new and useful Improvements in a Connection Between a VVatenTube and a Pressure-Basin Mounting the Water-Tube; and I do hereby declare the following to. be

a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

The problem of connecting steel tubes to water basins under high pressure affords the difficulty that water is liable to leak out between the concrete and the steel tube. This is a. very serious drawback, particularly for the reason that it is-practically out of the question to repair an embedded tube of this kind and in any case repairs require a long time to be carried out.

In order to obtain a tight connection and at the same time facilitate the conditions for repair, the tube according to the present invention is not embedded in the concrete but is mounted by means of a radial flange fastened to the tube in an opening of considerably larger diameter than the exterior diameter of the tube.

The said flange on the tube may rest directly on the concrete or it may bemounted on an inwardly projecting flange embedded in theconcrete around the opening in the same.

On the drawing is illustrated two embodiments of this invention.

Figure 1 is a diagrammatic section of a connection according to the invention. Fig. 2 is a detail section on a larger scale through part of the flange. Fig. 3 is a dia- Said flange as indicated in Fig. I may have the shape of a dome, the'exterior edge surface of which rests on the bottomof an annular groove 8 in the concrete block 2.

As indicated in Fig. 2 the edge 7 may be provided with a tightening device comprising a downwardly projecting annular rib 9 and a channel 10 of wedgeshaped cross section inside said annular rib 9, said channel 10 being provided with a rubber packing or the like. j 7

As indicated in Fig. 3 the flange Gin-- stead of resting directly on the concrete may be connected with an" inwardly projecting flange 5 embedded in the concrete around the opening3. 1 I

As it will be notedcboth the embodiments of the invention here specified afford the possibility of dismounting the connection without breaking up'the concrete.

In Fig. 4 my invention is illustrated as it is used in practice. This figure shows a lake having a rock bed and shows a pressure tunnel cut in the rock and leading to the base thereof where the device of the present invention is located. At this point the steel crete are diagrammatically shown in' this figure.

Claims. p i 1. In a connection between a water tube and a pressure basin mounting the water tube by means of a radial flange on the same in an opening in the wallof the pressure basin said opening havlng a considerably-larger diameter than the exterior diameter of the tube. I V

v 2. In a connection between a' water tube and a pressure basin mounting the water tube by means of a radial flange on the same in an opening in the wall of the pressure basin, the edge of said radial flange being supported by an inwardly projecting-flange embedded in the concrete around the open ing.

' In testimony that I claim the foregoing'as my invention I have signed my name in presence of two subscribing witnesses.

- .THORVALD HEYER-DAHL.

Witnesses:

lVIOGENs BUGGE, I

OLGA MtrLLER. 

